Method of charging cellulose digesters and the like and means therefor



Nov. 6, 192s. 1,690,192

P. A. FRESK METHOD OF CHARGING CELLULOSEDIGESTERS AND THE LIKE ANDMEANS THEREFOR Filed April 4, 1927 2 .4 2 v ii Patented Nov.-6,1-928 UNITED, [STAT- s PAT-Euros rnza ALBERT Inns]; oi! nonnmrsrons,

1. 90.192 FICE.

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Application filed A nn, 1927, Serial m For the'charging of cellulose digesters, the method of causingthe char'geor the chips to be entrained by a wa'seons or vaporous medium forced into the digester has been applied to I great advantage. In order then to effect spreading of the chips uniformly over the whole surface of the digester, it as proved advantageous to impart a rotary movement to thebody of chips entrained with the gas 'or vapor current. To this end, purely mechanical contrivances haye been employed heretofore, saidcontrivances having been devised in such a manner as to be able to'catch the chips entrained with the gas or vapor 1 current and to hurl th'em around and out wards. x

According to the present invention, another method is provided, wh-ich has proved exceedingly efficient and which has entailed considerable practical advantages. Themeehanical means required for the spreading will thus be simplified to a very great extent, and the" chips will be very uniformly distributed and will also be tightly packed. The charging takes place, without the chips being impeded b any member in the path thereof, and for this reason there will be no reduction of the rate at which the chips are forced into the digester and, consequently, the tight pac'k-- in of the chips is furthered in a high degree. he method according to the invention is principallycharacterized by the fact that the chip {while bein entrained by the medium forcsddnto the dlgester, are caused to rotate by the medium, the chips being guide-d during the'introduction thereof in such amanner as to be caused to rotate.

The accompanying drawing illustrates an example of charging means suitable for car- 4 rying out the method of the present invention. Fig. 1 shows the a paratus in vertical sec-' tion on line w?; in fliig. 2, which latter figure shows the apparatus-viewed: from above and in horizonta-l 'section. Fig. 3 shows a 46 detail to an enlarged-scale. j

, The arrangement "llustrated in the drawting isras'sumed to operate with compressed air forein' the chips into the digester. The c'ompresse air,'wh1ch'is preferably reduced 50 by means of a-fan (not shown in, the drawing) ,enters through the inlet 1 and flows fur ther inwards through the assage 2. ='This' passa is limited outwar by the spiralshape wall 3, and inwardly by the conical ll filling funnel' t to the outside of. which the wall 3 is connected, as at 5. The compressed 180,987, and in Sweden December 21, 1926..

air entering through the inlet 1 will thus follow the wall 3 in itsway inwards, and is guided by this wallin such a manner that, when the air penetrates further down through .the air will have a powerful rotary movement. In passing the nozzle, the air encounters the chips fed down from the funnel 4, a powerful screwing movement being then imparted to.

the chipsunder the iiifluence of the air, in a the nozzle 6 whichforms an annular opening,

directiondownwards through the tube 7.

lVhen the chips finally leave the tube, they 'willbe uniformly spread out overthe whole surface of the digester by reasonof the above mentioned screwing movement. Thus this introduction 'of the chips will "take place practically without any resistance whatever,

and the effect with which the chips are packed will thus be correspondinglycomplete. After the air has performed this work, it returns to fan through the annular opening 8 and the air distributing chamber 9, through a pipe (not shown) connected to the inlet side oi"- the fan, and will then, as long as the apparatus is in operation,'.perform the cycle and work described.

- The apparatus is adjusted for a greater or smaller passage of airor vapor, i. e. for a more or less intense spreadingand packing action, by the following arrangement. The area of the passage 2, the size of which should be in a certain relation to the area of the annular nozzle 6, is adapted to be controlled by the wall 3-which is adjustable. and for this purpose provided with fittings -10 coo with'fixed fittings 11. Both kinds 0 fittings are provided with elongated slots 12 and 13 respectively having screws 14 extending therethrough. Byloosening the screws,thefi tting may be displaced relatively one another, ac-.

cording to the desired adjustment of the wall, and the adjustment is secured by screwing 11 the screws. For thispurpose, the spiral-shape I wall 3 may, without being subjected to any alterations of its shape, be movable horizontally to and fro in all directions. 'The'funnel '90. erating 4 is adapted to be raised and lowered within wide limit andis, if desired, adjustable lat erally, in order to be, able to increase or de crease the area of the annular nozzle 6, or, perhaps 0 give the funnel an eccentric position with espeet to the tube 7. To this end, the r funnel is carried by fittings 15 (see Fig. 3)

cooperating with screws 16 and 17, the first mentioned of which exte d through, elongated slots 18 in the wal of the funnel 4,

while the latter screws likewise extend through elongated slots 19 in the fixed wall 20.

What I claim is 1. An apparatus for charging cellulose digesters comprising a feeding funnel through which the charge is introduced, a gas c011- veying passage through which a gaseous medium is forced into the digester, said passa e extending helically around said funnel, said helical passage opening into the space adjacent the outlet opening of the funnel whereby the charge when leaving the outletopening of the funnel is caught by the gaseous medium and is entrained in the movement thereof.

2. An apparatus according to claim 1 in which the gas conveying passage is formed of a spiral wall surrounding said feeding funnel, a wall connecting said spiral wall to the outside of the wall of the funnel, a downwardly extending annular funnel-shaped member secured to the spiral wall extending below the lower end of said feeding funnel and forming an annular space between said funnel members.

3. An apparatus according to claim 1 in which the gas conveying passage is formed of a spiral wall surrounding said feeding funnel, a wall connecting said spiral wall to the outside of the wall of the funnel, a downwardly extending annular funnel-shaped member secured to the spiral wall extending below the lower end of said feeding funnel.

and forming an annular space between said funnel members and means to adjust the. spiral wall horizontally to vary its relation to the feeding funnel.

4. An apparatus according to claim 1 in which the gas conveying passage is formed of a spiral wall surrounding said feeding funnel, a wall connecting said spiral wall to.

the outside of the wall of the funnel, a 'downwardly extending annular funnel-shaped member secured to the spiral wall extending below the lower end of said feeding funnel and formin an annular space between said funnel members and means to adjust the feeding funnel vertically with relation to the spiral wall.

5. An apparatus according to claim 1 in which the gas conveying passage is formed of a spiral wall surrounding said feeding funnel, a wall connecting said spiral wall to the outside of the wall of the funnel, a downwardly extending annular funnel-shaped member secured to the spiral wall extending below the lower end of said feeding funnel and forming an annular space between said funnel mem bers, means to adjust the spiral wall horizontally to vary its relation to the feeding funnel and means to adjust the feeding funnel vertically with relation to the spiral wall.

6. An apparatus according to claim 1 in which the gas conveying passage is formed of a spiral wall surrounding said feeding funnel, a wall connecting said spiral wall to the outside ofthe'wall of the funnel, a downwardly extending annular funnel-shaped member secured to the spiral wall extending below the lower end of said feeding funnel and forming an annular space between said funnel members, and means to adjust both the feeding funnel and the spiral wall relative to each other. I

In testimony whereof I affix my signature.

' PER ALBERT ERESK. 

